Question 42
Latitude and LongitudeWhat is the circumference of radius of the earth?
- A.R cos θ
- B.2π R cos θ
- C.R sin θ
- D.2π R sin θ
Show the answer and explanation
Answer: B (2π R cos θ)
Explanation
The circle of latitude θ° has radius R cos θ, where R is the radius of the earth. Its circumference is 2πR cos θ.